Franking system



FIG. 1 is a perspective view of a franking system showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof; and,

FIG. 5 is a front elevation view thereof.

The broken line showing is included for the purpose of illustrating environment and forms no part of the claimed design. 

The ornamental design for a franking system, as shown and described. 